Laundry blue.



U Nllllilll) STATlTlllS IVATENT OFFICE.

ROBERT (l. (iRlbWULU AND WILLIAM T. DONOVAN, OF QUINCY, MASSA C ll USE'lTS.

LAUNDRYVBVLVUE.

No. 824, 294. Specification oi Letters Patent. Patented June 236 1906.

Aoplioation filed August 22, 1965. serial 1%. 275.288.

To mil wh om it may concern.-

Be. it known that we, Rossini G Gnis W011; and Winn-in T. DONOVAN,citizens of the United States, residing at Quincy, in the county ofNorfolk and Slate of Massachusetts, have invented a new and useful Bluinfor Laundry and othcr Purposes, of whio the following is aspebification.

This invention relates to bluing for laundry and other purposes.

The objoot of the invention is to furnish s laundry bluin in aconvenient and consentraticd forni w ich shall be free fromobjectionsblcfeaturss present in cxistin articles of this character andone that in sdllition to su plying a definite amount of coloring in (liil used condition will also supply a disinfecbant and a color-bleaohingagent in such quantities as shall be thoroughl T effective in securingthe ob'ccts sought, w rich shall be compact, can e hnndled withoutsoilin either hands or clothing, can neither 5 ill nor scatter, and willnot freeze as do liqui forms of laund bluing.

With '5 e above and other objects in View,

' as will appear as the nature of the invention 4 described and claimed.

, is better undoretood the same consists in the no'vel form ofcompressed and efiervescent laundry bluing, as will be hereinafter fullyThe blumg' is composed of the followi in gredionts' substantially thepro or ons specified byweight: anilin-blue, one undrsd and, ninotytwoparts; sodium bios; onato,

5 sorority-four parts; tartaric said, on has dred and fourteen parts}carbolic said, waive port's; calcium h ochlorite, ten to enty arts;sacoharin, g case, or dextrin -swo to our parts. hose edients are thors4o oughly mixod before being formed into tablets by 4 5 in either ofthese l mill, wheroitiis grannlafied bypassing .t

ding in a ball-mill. During this mp of procedure either ethyl or math 1alcohol is blown into the mass from a. suitab e atomizer, and the i ant,whish insoluble allio ois, forms 2. close-mo chanioal mixturefwith theother ingredients that are not soluble, or only sparing! swin thealcohol, The resulting paste is t on re-- moved from thei boll-mill ho agranulatihfi;

a solios of perforated screens onto trays or endless belts. These boltspass tlrrou ii an own or evs mrator, where the excess 0 alcohol isevaporated b gentle heat, leaving the mnulos perfectly (l l mslly fed toa machine, which com resses a. measured quantity into a tablet. 11 usingthese tablets itis only necessary to throw a tablet into water,whereupon it instantly dissolves snd disseminates and difluses the colorthroughout the liquid, can ing with it to all parts the disinfecting andbleaching agents. The chemical notion that takes place when a, tablet isdrop ed into water is as follows: The acid and iii slino ingredients arebrought into intimate contact in solution and form a.

of this action is a gas which is generated so rapidly that it tears thetablet asunder, and thus gives the wot-er anopportunit to come intocontact with practically t e entire amount of the pi ment at once. Therapidlyrisin'g bubbles 0 gas set, up a current which entire body ofwater instead of allowing it to lie as an inert mass of colored water atone place. 1 B chloritc, l; e blesc in properties of .w ch are wellknown, shoulr an oxcess of coloringnislsiler lodge upon a garment itwill be prevcnasd from unduly staining it. The henol aotsss adisinfectant to neutralize or diastro any germs present and also impartsa pleassnt odor to the amnents. Fnrlzhsr on m the oornplstion of tfiolaundering it acts in an oflavin thus described the invention, whatjsclaime is .11. An cffervssoenll laundry bluing including oslciumhypoohlorite and a dismfocbing nt. A. eflervoscent laund bluingincludingcaloium hypochlorito an car 0110 acid. 3. An'ofiervescsntlan'ndry-bluin tablet consisting of anilimblue, sodium bicar onabs,

' acid, and a binder.

. 4. A11 effervescent consisting of the following ingredients in sub ry,and bh mass is then carries the dissolved pigment throughout ihc emploing the calcium h 0-.

7 o s" festive manner to prevent starch from 8013- tartaric acid,calcium hypochloi'ite, carbolio laundrybilling labial stantially theproportions s ecified by weight anilin-blue one hundred unrninety-two'parts, sodium bicarbonate seventy-four parts, tartario acid.one hundred and fourteen arts, 5 carbolic acid twelve parts, calciumIypoohlorite ten to twelve parts and saocharin, Witnesses: glucose or(loxtrin two to four parts. WILLIAM MCSWEENEY, In testimony that weclaim the foregoing 1 MICHAEL AIHORIGAN,

as our own we have horolo allixml our signatures In tho presence of twowItuossos.

ROBER'I (l. (HHSWULD WILLIAM 'l. DUNO VAN

